Replace scoped_ptr with unique_ptr in webrtc/media/

webrtc/media/base/rtpdump_unittest.cc

Index: webrtc/media/base/rtpdump_unittest.cc
diff --git a/webrtc/media/base/rtpdump_unittest.cc b/webrtc/media/base/rtpdump_unittest.cc
index b1770e7471f02f545b73da80e527561a56561cb2..a5b79c9e946f9079232ad2ff89efb24db8960b80 100644
--- a/webrtc/media/base/rtpdump_unittest.cc
+++ b/webrtc/media/base/rtpdump_unittest.cc
@@ -8,6 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include <memory>
 #include <string>
 
 #include "webrtc/base/bytebuffer.h"
@@ -61,7 +62,7 @@ TEST(RtpDumpTest, ReadRtpDumpFile) {
   RtpDumpPacket packet;
   rtc::MemoryStream stream;
   RtpDumpWriter writer(&stream);
-  rtc::scoped_ptr<RtpDumpReader> reader;
+  std::unique_ptr<RtpDumpReader> reader;
 
   // Write a RTP packet to the stream, which is a valid RTP dump. Next, we will
   // change the first line to make the RTP dump valid or invalid.